This sounds like your external drive is not fast enough deliver the video stream fast enough for real time viewing. It is possible that if your drive is very full and the file is fragmented on the disk that the read head is hunting too much for the all the parts of the file. Gerhard On Monday, April 14, 2003, at 11:57 AM, Robert Schoenburg wrote: > Here is the problem. If the project is on the main iMac drive, it works > fine. If the project is on the Western Digital drive, the video on > the TV > is very erratic, and there is no sound. In both cases, the playback is > fine > on the iMac. > >